"Our report does not identify any concerns about Cleveland's financial management of the grant, the expenditures it made with the money or the accuracy of its federal financial reports," Horowitz said.

The audit does say the city didn't properly keep records on vehicles it purchased.

"Although most items obtained with RNC grant funds were properly identified in Cleveland’s inventory system as being purchased with federal funds, we found that $3.2 million in automobiles were not identified as federally funded," the audit reads.

Cleveland has since fixed the problem, according to the report.

In a statement released today, Mayor Frank Jackson thanked city workers and others who helped with the convention.

"While the positive results of the Department of Justice audit may be a surprise to some, it was no surprise to the City of Cleveland," Jackson said.